[Q] 'Roaming Dialind Selection' every time when i call, call has been lost.. topic

Hi friends

I am facing a irritating issue with my ZTE n799D CDMA + GSM phone. (GSM Works fine.)
Every time when I make a call from cdma system prompts for "ROAMING DIALING SELECTION" which has followong three options
1. Local Phone Number
2. MainLand China Phone Number
3. Foreign Phone Number.
Once I select any of the above then only I can make call.

If I dial any phone number with country code it shows 'CALL HAS BEEN LOST'

Moreover my lock screen shows Bejieng Time.

I have tried updating all three ROMs available at zte website.
Nothing worked.

Guys please help!